I recently cleaned out my fish and noticed last night one was missing. Sadly found it down the side of the tank on the floor. I think it may have jumped out before I could put the lid back on.
Oh that's sad. My cousin once moved his fish bowl, situated beneath the dart board, when he fancied a game -for the fish's own safety. Trouble is the wally put it, and left it overnight, on a heater!! RIP Jaws